78681704 has 16 divisors (see below), whose sum is σ = 149947620. Its totient is φ = 38695680.

The previous prime is 78681697. The next prime is 78681737. The reversal of 78681704 is 40718687.

It can be written as a sum of positive squares in 2 ways, for example, as 77404804 + 1276900 = 8798^2 + 1130^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80129 + ... + 81104.

Almost surely, 2^78681704 is an apocalyptic number.

It is an amenable number.

78681704 is a deficient number, since it is larger than the sum of its proper divisors (71265916).

78681704 is a wasteful number, since it uses less digits than its factorization.

78681704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161300 (or 161296 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 78681704 is about 8870.2707963173. The cubic root of 78681704 is about 428.5069981025.

The spelling of 78681704 in words is "seventy-eight million, six hundred eighty-one thousand, seven hundred four".